<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>SSO单点登录</title>
</head>
<body>
    <h1>欢迎访问单点登录系统</h1>
    <form action="doLogin" method="post">
        <input type="text" name="username" placeholder="请输入用户名">
        <input type="password" name="password" placeholder="请输入密码">
        <input type="hidden" name="returnUrl" th:value="${returnUrl}">
        <input th:type="submit" th:value="提交登录">
    </form>
    <span style="color:red" th:text="${errmsg}"></span>
</body>
</html>